On a map 2 centimeters represents 100 kilometers. how much of a centimeter represents 20 kilometers

Which of these tables represents a non-linear function?

Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet

What is value of x? enter your answer in the box. x =